<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>生日快乐滚动版</title>
    <style>
        body {
            background-color: #f0f0f0;
            margin: 0;
            padding: 0;
            overflow: hidden;
            font-family: Arial, sans-serif;
        }
        .scroll-container {
            width: 100%;
            height: 100vh;
            overflow: hidden;
            position: relative;
        }
        .scroll-text {
            display: flex;
            white-space: nowrap;
            position: absolute;
            top: 50%;
            left: 100%;
            transform: translateY(-50%);
            font-size: 3em;
            color: #ff4500;
            animation: scroll-left 10s linear infinite;
        }
        @keyframes scroll-left {
            0% {
                left: 100%;
            }
            100% {
                left: -100%;
            }
        }
    </style>
</head>
<body>
    <div class="scroll-container">
        <div class="scroll-text">生日快乐！</div>
    </div>
</body>
</html>